AM27C040-150DC AMD (ADVANCED MICRO DEVICES), AM27C040-150DC Datasheet - Page 6

• Manufacturer Part Number: AM27C040-150DC
• Manufacturer: AMD (ADVANCED MICRO DEVICES)

Specifications of AM27C040-150DC

• Density: 4Mb
• Access Time (max): 150ns
• Supply Current: 40mA
• Pin Count: 32
• Mounting: Through Hole
• Operating Temperature Classification: Commercial
• Lead Free Status / RoHS Status: Supplier Unconfirmed

common connection to all devices in the array and con-
nected to the READ line from the system control bus.
This assures that all deselected memory devices are in
their low-power standby mode and that the output pins
are only active when data is desired from a particular
memory device.
System Applications
During the switch between active and standby condi-
tions, transient current peaks are produced on the ris-
ing and falling edges of Chip Enable. The magnitude of
MODE SELECT TABLE
Note:
1. V
2. X = Either V
3. A1 – A8 = A10 – A18 = V
4. See DC Programming Characteristics in the EPROM Products Data Book for V
6
Mode
Read
Output Disable
Standby (TTL)
Standby (CMOS)
Program
Program Verify
Program Inhibit
Auto Select
(Note 3)
H
= 12.0 V
IH
0.5 V.
or V
Manufacturer Code
Device Code
IL
IL
V
CE#/PGM#
CC
V
V
V
V
V
V
V
V
+ 0.3 V
IH
IH
IL
IL
IL
IL
IL
IL
F I N A L
Am27C040
OE#
V
V
V
V
V
V
these transient current peaks is dependent on the out-
put capacitance loading of the device. At a minimum, a
0.1 µF ceramic capacitor (high frequency, low inherent
inductance) should be used on each device between
V
to overcome the voltage drop caused by the inductive
effects of the printed circuit board traces on EPROM ar-
rays, a 4.7 µF bulk electrolytic capacitor should be used
between V
tion of the capacitor should be close to where the
power supply is connected to the array.
X
X
X
IH
IH
IL
IL
IL
IL
CC
and V
SS
CC
V
A0
V
X
X
X
X
X
X
X
IH
IL
to minimize transient effects. In addition,
and V
PP
voltage during programming
SS
for each eight devices. The loca-
A9
V
V
X
X
X
X
X
X
X
H
H
V
V
V
V
X
X
X
X
X
X
PP
PP
PP
PP
Outputs
HIGH Z
HIGH Z
HIGH Z
HIGH Z
D
D
9Bh
01h
D
OUT
OUT
IN